SQ Airline Code, Singapore Airlines
SQ is the IATA airline code for Singapore Airlines, based in Singapore. Its ICAO code is SIA and its radio callsign is "Singapore".
What airline is SQ?
SQ is the IATA airline code for Singapore Airlines, based in Singapore. Its ICAO code is SIA and its radio callsign is "Singapore".
The open dataset lists 212 scheduled routes for the carrier, placing it at number 85 among airlines worldwide. You will see SQ as the two-character prefix on its flight numbers, for example SQ123.
| IATA airline code | SQ |
|---|---|
| ICAO airline code | SIA |
| Radio callsign | Singapore |
| Country | Singapore |
| Alliance | Star Alliance |
| Scheduled routes | 212 (ranked #85) |
| Most routes at | SIN Singapore |
| Status | Active |
What is the airline code for Singapore Airlines?
The IATA airline code for Singapore Airlines is SQ, and its ICAO code is SIA. The two-character IATA code prefixes the carrier's flight numbers, for example SQ123.
IATA airline codes are two characters and can reuse letters over time, so a retired airline's code may later be assigned to another carrier. ICAO codes are three letters and are more stable, which is why flight plans use them.
Where the SQ code comes from
SQ has identified Singapore Airlines since the carrier emerged from the 1972 split of Malaysia-Singapore Airlines, when the joint operation divided into Singapore Airlines and Malaysia Airlines. The Q is usually explained as a distinctive free letter rather than an abbreviation. All SQ flights revolve around Singapore Changi.
More on how these identifiers work in what an IATA code is and airline callsigns.
What are Singapore Airlines's hub airports?
Singapore Airlines (SQ) concentrates its network on SIN (Singapore).
Which airport does Singapore Airlines serve most?
Singapore Airlines (SQ) appears on more routes at SIN, Singapore, than at any other airport in the open route dataset.
The airports Singapore Airlines appears at most often in that dataset, most routes first:
Routes flown by Singapore Airlines
The busiest pairs Singapore Airlines (SQ) is listed as operating in the open route dataset (codeshare-only listings excluded), with distance and typical flight time:
Route and carrier data comes from the OpenFlights open dataset, regenerated here on . It is a historical snapshot of scheduled connections, not a live schedule, and it includes codeshare listings, so some carriers shown may no longer operate the route or exist. How we build this · Data and sources.
Frequently asked questions
What is the ICAO code for Singapore Airlines?
Singapore Airlines uses the ICAO airline code SIA and the radio callsign "Singapore". Flight plans and air traffic control use SIA, while tickets and schedules use SQ.
What is the radio callsign for Singapore Airlines?
Air traffic control refers to Singapore Airlines by the radio callsign "Singapore".
What country is Singapore Airlines based in?
Singapore Airlines (SQ) is based in Singapore.
What is the abbreviation for Singapore Airlines?
The two-character IATA abbreviation for Singapore Airlines is SQ, and its three-letter ICAO code is SIA.
How many routes does Singapore Airlines fly?
The open route dataset lists 212 route entries for Singapore Airlines, codeshare listings included, which ranks the carrier number 85 by that count. The route table below shows only the pairs Singapore Airlines is listed as operating.
Is Singapore Airlines in an airline alliance?
Singapore Airlines (SQ) is a member of Star Alliance, the global airline alliance founded in 1997. Membership means shared lounges, frequent flyer recognition and connecting networks across the member carriers.